Observations of active-chromosphere stars. II - Photometry of AB Dor, 1978-1987

Details Observations of active-chromosphere stars. II - Photometry of AB Dor, 1978-1987 Observations of active-chromosphere stars. II - Photometry of AB Dor, 1978-1987

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.235.1411i&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 235, Dec. 15, 1988, p. 1411-1422. Research supported by

Other

71

Astronomical Photometry, Chromosphere, Late Stars, Stellar Activity, K Stars, Light Curve, Starspots, Stellar Rotation

Scientific paper

Photometric observations of the rapidly rotating late-type active star, AB Dor, are presented. The results are combined with previous data to give 18 light curves from late 1978 to early 1987. The data suggests that AB Dor had two large, long-lived starspots during this period. One appeared in late 1979 and decayed almost completely over a three-year period. The other was present in late 1978, decayed, and reappeared in late 1981. It intensified and dominated the light curve in early 1984. The rotational periods of the spots during this period were constant and identical. These periods were determined to be 0.51479 day.

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